Rotary engine.



No. 7|3,3o|. Patented Nov. H, |902.

' .1. c. HAGERTY.

RDTABY ENGINE.

(Apu t man 12 1902 2 Sheets-Sheet 2.

(N0 Model.)

UNITED STATES PATENT OFFICE.

JOHN C. HAGERTY, OF SANTA CRUZ, CALIFORNIA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 713,301, dated November11, 1902.

l Application iiled March 12,1902y Serial No. 97.827. (No model.)

T0 a/ZZ whom it may concern:

Be it known thatl, JOHN C. HAGERTY, a citizen of the United States,residing at Santa Cruz, county of Santa Cruz, State of California, haveinvented an Improvement in Rotary Engines; and I hereby declare thefollowing to be a full, clear, and exact description of the same.

My invention relates to an engine or mechanism to be propelled by amedium under pressure.

It consistsI of a smooth circular disk eccentrically mounted within acircular casing, so that at oneside the periphery of the disk forms atight joint with the interior of the casing as the eccentric revolves,an abutment slidable in line with the shaft and means for moving it tomaintain it continually in contact with the periphery of the revolvingeccentric, means for admitting a medium under pressure upon one side ofthe abutment between the eccentric and the casing, so that the pressurewill act upon the larger diameter of the eccentric, and means forexhausting the medium from the opposite side of the abutment. Y i

My invention also comprises devices for adjusting the eccentric tomaintain the joint between it and the casing, means for adjusting themechanism by which the sliding abutment is actuated, and details ofconstruction which will be more fully explained by reference to theaccompanying drawings, in whichv Figure l is a vertical section of theengine on line y y, Fig. 2. Fig. 2 is a similar section on line a;Fig. 1. Fig. 3 is a vertical section on line o c, Fig. 4, showing amodification. Fig. 4 is a horizontal section of the same on line a' a,Fig. 3. other modification in section on line t t, Fig. 6. Fig. 6 is ahorizontal view of the same on line w yw, Fig. 5.

A is a cylindrical casing which may be divided by diaphragms into aplurality of chambers, 0r, if preferred, a plurality of separate casingsmay be mounted axiallyin line upon the same base or support. Through thecenter ot these casings passes a suitably-journaled shaft 2, and uponthis shaft is fixed in each of the chambers an eccentric-disk 3. Theeccentricity of this disk is such that at Fig. 5 is still an-` thelargest part of its throw it contacts with the interior of ythe casingand forms a sufficiently tight joint at the point of contact to preventthe escape of steam or other medium under pressure which may be employedto impel it. These eccentrics are so mounted upon the shaft that theymay be adjusted for wear by means of a nut and screw, as shown at 4, soas to keep the periphery of the eccentric in proper adjustment withrelation to the interior of its casing.

The sides of the casing are sufficiently close to the side of theeccentric to form a steamtight joint therewith, or such joint may beformed by means of packing-rings between the eccentric and the casing.

At suitable points around the periphery of the casing channels are madefor the recep tion of sliding abutments 5. One, two or more of thesechannels and abutments may be used. It two are used, they can be placedopposite to each other, and the abutments are slidable radially withrelation to the shaft or axis 2. These abutments are suitably fitted intheir guides and may have roller or equivalent bearings, as at 6, torelieve friction. They may also have a suitable packing to preventleakage. These abutments are moved in unison with the movements of theeccentric, so as to follow the periphery of the eccentric and tomaintain close joints with each eccentric. If two of the' chambers andeccentrics be used, the eccentrics may be set either opposite to eachother or in any other suitable relation. It' more than two be used, theeccentrics may be so set upon the shaft that the throws of theeccentrics would be equidistant from each other. The sectional viewshows an arrangement of one eccentric within its casing, and thisrepresents each of any number which may be employed in the constructionof the engine.

7 represents the admission-port, and 8 the' exhaust-port, of eachchamber, and when the medium under pressure is admitted through the port7 the pressure exerted upon the periphery of the larger part of theeccentric is equivalent to the same pressure exerted upon a piston thearea of whichv is equal to the cross-section of the major diameter ofthe eccentric, and by this pressure the eccentricl will be continuallydriven around within the IOO casing until the contact portion of theeccentric passes the exhaust-passage 8, when the medium will exhaust atthis point.

The abutment 5 is constantly moved in unison with the movements of theeccentric, so as to maintain itin contact, and this movement may beeffected by any suitable or desired mechanism.

I have shown iu Figs. l and 2 a device which is suitable for twochambers and eccentrics standing side by side and having the eccentricsset with the throws opposite to each other. In this case the endsof theslides 5, within their guide-chambers, rest upon the ends of arocker-arm 9, which is centrally supported upon a rounded cap, as at 10,the center of the rocker being channeled to iit upon the cap, or it maybe supported upon a fixed oscillating shaft. The ends of the rockers arepreferably fitted with autifrictional rollers, as at 1l, where theycontact with the slides, thus reducing friction to a minimum. Themovement of one slide which is being forced out of its chamber by therevolution of the eccentric will be communicated through the rocker tosimultaneously move the other slide into the chamber and cause it tofollow its eccentric, thus keeping tight joints in both.

Suitable packing of any description may be itted to the ends of theslides,which contact against the eccentric to maintain an adjustablejoint. Any wear of these parts may be taken up by means of screws, as atl2, the ends of which act against the cap l0, on which the rocker-armoscillates, thus moving the rocker, with the cap, so as to keep its tipsin constant adjustment with the slides.

In Figs. 3 and 4 I have shown another form, in which the slides aremoved by rods, as at 13. The outer ends of said rods are connected withthe slides, and the inner ends have rectangular openings made in them,as at 14. Within these openings eccentrics l5 are revoluble, theseeccentrics being fixed upon the shaft 2. The rectangular yoke is of suchlength transversely as to allow the throw of the eccentric withoutcontact with the ends of the opening; but in the line of movement of theslides the space is just wide enough to admit the eccentric, so that thethrow of the eccentric is communicated to the yoke and its arms, andthus acts to reciprocate the slide, as previously described.

In Figs. 5 and 6 I have shown the yokes extending entirely across fromone side to the other of the casing, as at 16, and in this case thecentral portion is slotted to fit over the shaft, as at 17, the slotbeing long enough to allow the proper throw. The arms 16 at one endconnect with one of the slides and at the other end with the oppositeslide, so that the outward movement of one of the slides acts throughthese arms to produce an inward movement of the other slide, the twooperating in unison.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. A rotary engine consisting of circular casings, eccentrics mountedupon journalshafts extending axially through the casings, saideccentrics having a throw which maintains the end of the greater radiusin constant contact with the interior of the casing, abutments slidableradially, and means maintaining said abutments in constant contact withthe periphery of the eccentrics, and radiallyadjustable devices foradjusting the eccentric with relation to its shaft to maintain the jointbetween it and the casing.

2. A rotary engine consisting of circular casings, eccentrics mountedupon journalshafts extending axially through the casings, saideccentrics having a throw which maintains the end of the greater radiusin constant contact with the interior of the casing, abutments slidableradially, and means maintaining said abutments in constant contact withthe periphery of the eccentrics, a radial screwand-nut mechanism foradjusting the eccentric with relation to its shaft, and an adjustablesupport for adjusting the sliding abutments whereby the joint betweenthe eccentric and the casing and between the abutments and the eccentricare maintained.

3. The combination in a rotary engine of a plurality of cylindricalcasings having a common axis and journal-shaft extending therethrough,eccentrics mounted upon said shaft in each casing having their majoraxes such as to form a constant joint with the interior of the casingsand opposite to each other, radial screw and nut mechanisms foradjusting the eccentrics with relation to the shaft, slidable abutmentsguided and movable in line with the axis, rocker-arms with which theouter ends of the abutments contact whereby the outward movement of oneabutment acts to move the other one inwardly and maintain its contactwith the periphery of its eccentric, and an adjustable support uponwhich the rocker-arm is seated.

4. The combination in a rotary engine of two casings side by side havinga common axis and a journal-shaft extending therethrough, eccentricsfixed upon said shaft to have diametrically opposite throws in theirrespective casings, and revoluble with their greater radius in constantcontact with the interior of their casings, radially-slidable abutments,means by which said abutments are caused to move in unison and maintainconstant contact with the peripheries of their respective eccentrics,roller-guides between which the abutm ents are movable,and rockerarmsand an adjustable support therefor said arms engaging the outer ends ofthe abutments.

5. The combination in a rotary engine of two casings side by side havinga common axis and a journal-shaft extending therethrough, eccentrics xedupon said shaft to have diametrically opposite throws in their IOS IIO

naled in the ends of said arm and contacting 1o Wit-h the outer ends ofthe abutments, and

means for adj usting the bearing of the rockerarm whereby the abutmentsare simultaneously adj usted to Contact with the eceentries. In Witnesswhereof I have hereunto set my hand.

JOHN C. HAGERTY.

Witnesses:

S. H. NoURsE, JEssIE C. BRoDIE.

